sa se rezolve in multimea z ecuatiile (dau corană(

Răspuns:
a) 3×(X-2) = 24 b) 8×(X+5) = 72
3x - 6= 24 8x + 40=72
3x = 24+ 6 8x= 72-40
3x= 30
x=30:3 8x= 32
x= 10 x= 32:8
x= 4
c) 7× ( X-5 ) = 21
7x - 35= 21
7x= 21+35
7x= 56
x= 56:7
x= 8
d) -2× ( X-9) = 28
-2x+ 18= 28
-2x= 28-18
-2x = 10
x = -5
e) -15× ( X+6) = 120
-15x - 90= 120
-15 X = 210
-× = -14
f) -12× ( x+10) = -96
-12x - 120= -96
-12x = -96+120
-12x= 24
-x= -2
succes